Function: minus(numbers("yyy") if log(numbers('xry'), numbers("xxx")) > numbers('xry') else numbers("xxx") if numbers("xxx") > numbers('xry') else log(numbers('xry'), numbers("xxx")) if numbers('xry') > numbers("yyy") if numbers("xxx") > numbers('xry') else log(numbers('xry'), numbers("xxx")) else log(numbers('xry'), numbers("xxx")), numbers("xxx") if log(numbers('xry'), numbers("xxx")) > numbers('xry') else numbers('xry') if numbers("yyy") > numbers("xxx") else log(numbers('xry'), numbers("xxx")))